Why is it scaled up to 3000x4197 without any special filtering? There's no point in making the file just bigger with that - Firefox itself could scale it that way. That looks just terrible... and speaking of terrible: I still think it's a terrible poster. Of course, that's not your fault, it looked terrible to begin with (although putting Purcell's Guybrush face in there doesn't really help).
And I still don't understand why they used that version (which looks like they couldn't decide whether they want a "realistic", or a cartoony look for the characters), when they already had a cartoony version, which looked much more consistent:
But enough with the ramblings and thanks for the effort